/*
 * Copyright 2012 - 2014 Benjamin Weiss
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.keyboardsurfer.android.widget.crouton;

import android.content.Context;
import android.graphics.Typeface;
import android.support.v4.util.LruCache;
import android.text.TextPaint;
import android.text.style.MetricAffectingSpan;

/**
 * Style a spannable with a custom {@link Typeface}.
 */
public class TypefaceSpan extends MetricAffectingSpan {
	/** An <code>LruCache</code> for previously loaded typefaces. */
	private static LruCache<String, Typeface> sTypefaceCache = new LruCache<String, Typeface>(
			5);

	private Typeface mTypeface;

	/**
	 * Load the {@link Typeface} and apply to a spannable.
	 */
	public TypefaceSpan(Context context, String typefaceName) {
		mTypeface = sTypefaceCache.get(typefaceName);

		if (mTypeface == null) {
			mTypeface = Typeface.createFromAsset(context
					.getApplicationContext().getAssets(), String.format("%s",
					typefaceName));

			// Cache the loaded Typeface
			sTypefaceCache.put(typefaceName, mTypeface);
		}
	}

	@Override
	public void updateMeasureState(TextPaint p) {
		p.setTypeface(mTypeface);
	}

	@Override
	public void updateDrawState(TextPaint tp) {
		tp.setTypeface(mTypeface);
	}
}